To mince a quite minor point...
Comision Federal de Electricidad is 127 vac 60 Hz. 254 volts for servivio de dos hilos. The electrical appliance standards bureau is called NOM.
I have to work with this stuff all the time building filter suppressors and line protection for lightning strikes.
Now for extra information :)
Mexico uses neighborhood service distribution networks supplied by a WYE rather than a DELTA wound transformer. This is why in urban areas 4 vertically stacked wires are found on power poles. It is common for one 25 Kw transformer to supply a dozen residences. A 200 ampere SINGLE RESIDENCE service drop in the USA may use the same potential transformer only in single phase configuration.
Businesses who require a dedicated service drop transformer pay for the transformer and for it's installation.
(30) occupied spaces at an RV park equipped with 15 ampere receptacles operating at capacity can draw 57,000 + watts. 2 phases halve that burden to 28.000 VA each leg. Divide 57K / 3 for a three phase service transformer feed.
This will give a starting point to guesstimate park burden versus capacity issues. I have seen few three phase transformers in Mexico rated for above 25 KW.
And keep in mind, a single 15-amp receptacle per rig.
Now, run and go look at the size of that transformer :)